Bump Orc.Theming from 5.0.1 to 5.1.1 in /src

Bumps [Orc.Theming](https://github.com/wildgums/orc.Theming) from 5.0.1 to 5.1.1.
- [Changelog](https://github.com/WildGums/Orc.Theming/blob/develop/GitReleaseManager.yaml)
- [Commits](WildGums/Orc.Theming@5.0.1...5.1.1)

---
updated-dependencies:
- dependency-name: Orc.Theming
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

src/Orc.Squirrel.Xaml/Orc.Squirrel.Xaml.csproj

@@ -24,7 +24,7 @@
     </PackageReference>
     <PackageReference Include="ModuleInit.Fody" Version="2.1.1" PrivateAssets="all" />
     <PackageReference Include="Obsolete.Fody" Version="5.3.0" PrivateAssets="all" />
-    <PackageReference Include="Orc.Theming" Version="5.0.1" />
+    <PackageReference Include="Orc.Theming" Version="5.1.1" />
   </ItemGroup>
 
   <ItemGroup>